Hi All, I submited a feature request of providing acknowledgemode expecially client acknowledge mode whic jira link is https://issues.apache.org/jira/browse/ROCKETMQ-40?jql=project%20%3D%20ROCKETMQ
And a few days ago ,I submited a pr https://github.com/apache/incubator-rocketmq/pull/40 for a implemention on concurrently consuming, which providing a new Interface with a method called acknowledgementMode(), based on which to decide whether to persist offset. Since I am trying not to modify the existing interface to make it compable with the existing versions, so I created a new listsner called MessageListenerConcurrentlyV2 This is my rough implementation, any good adivce on this? Best Regards Jaskey
